/Engine/Source/Runtime/MovieScene/Public/Evaluation/Blending/MovieSceneBlendingAccumulator.h
Define an actuator with the specified unique ID that operates on a specific data type
A pointer to an actuator if one already exists, nullptr otherwise
void DefineActuator ( [FMovieSceneBlendingActuatorID](API\Runtime\MovieScene\Evaluation\Blending\FMovieSceneBlendingActuatorID) InActuatorTypeID, [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IMovieSceneBlendingActuator](API\Runtime\MovieScene\Evaluation\Blending\IMovieSceneBlendingActuator) > InActuator )